This songs timestamp is 4:20, and is most likely an obvious reference to a certain green substance people can use to get sleepy.
I'm a sleepy time baby
A sleepy time boy
Work only maybe
Life is a joy
We'll have a sleepy time time
We'll have a sleepy time time
We'll have a sleepy time time
We'll have a sleepy time time
Sleepy time time
Sleepy time time all the time
Asleep in the daytime
Asleep at night
Life is all playtime
Working ain't right
We'll have a sleepy time time
We'll have a sleepy time time
We'll have a sleepy time time
We'll have a sleepy time time
Sleepy time time
Sleepy time all the time
I have my Sunday
That ain't no lie
But on Monday morning
Comes my favourite cry
We'll have a sleepy time time
We'll have a sleepy time time
We'll have a sleepy time time
We'll have a sleepy time time
Sleepy time time
Sleepy time all the time
Sleepy Time Time was written by Jack Bruce & Janet Godfrey.
Sleepy Time Time was produced by Robert Stigwood.
Cream released Sleepy Time Time on Fri Dec 09 1966.